Method and system for creating magnetic resonance images

Abstract

In a method and system, a reference dataset is recorded using a reference scan based on a GRE or RA RT sequence. A correction dataset is also recorded using a phase correction scan based on a non-phase-encoding EPI sequence. A measurement dataset is recorded using an SMS sequence. Slice-specific GRAPPA kernels are determined from the reference dataset and magnetic resonance images are created by a slice GRAPPA method. Data of the measurement dataset belonging to different slices is separated from one another using the slice-specific GRAPPA kernels and N / 2 ghost artifacts are corrected using the correction dataset.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This patent application claims priority to European Patent Application No. 18195188.0, filed Sep. 18, 2018, which is incorporated herein by reference in its entirety.BACKGROUNDField[0002]The disclosure relates to a method for creating magnetic resonance images of a target object and to a magnetic resonance system configured for this purpose. Further aspects of the present disclosure are a corresponding computer program or computer program product, a corresponding data medium signal and a computer-readable data medium on which an inventive computer program or computer program product is stored.Related Art[0003]These days magnetic resonance imaging is an established and well-known specialist field in which numerous different methods for data acquisition and imaging are known. One such method is Parallel Imaging (PI). A known technique of parallel imaging is Generalized Autocalibrating Partial Parallel Acquisition (GRAPPA). In this method on...

AI Technical Summary

Benefits of technology

[0044]The characteristics and development of the inventive method, of the inventive magnetic resonance system and of the other aspects of the present disclosure specified above and below as well as the corresponding advantages are able to be mutually transferred analogously in each case between the inventive method, the inventive magnetic resonance system and the other aspects of the present disclosure. Those developments of aspects of the present disclosure, which have embodiments that, to avoid unnecessary redundancy, are not explicitly described separately in the respective combination or for each aspect of the disclosure, thus also belong to the disclosure.

Problems solved by technology

Since in SMS methods the individual slice data is collapsed, correction methods known from non-simultaneous imaging methods cannot readily be used.

Therefore relatively time-consuming preparation and reference scans have previously been used for the calibration or artifact correction respectively, which disadvantageously can take up a significant proportion of the overall time needed for examination of the target object.

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